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FREDERIOKHARTT KNEVITT AND HENRY HERBERT HAZARD, OF LONDON, ENGLAND, ASSIGNORS'TO FREDERICK HARTT KNEVITT.

Letters Patent-NO. 96,014, dated October 19, 1869.

:MrRovED WINDOW-SHUTTER AND BLIND.

The Schedule referred to in these Letters Patent and making parli 0f the 5am@ To all whom it 'may concern Be it known that we, FREDERICK HARTT KKEVITT and HENRY HERBERT HAZARD, both of London, England, have invented certain nev.1 and useful lmprovements in Shutters and Blinds for Windows, Doorways, and other Apel-tures, and the means for adjusting'the same,A and we do hereby declare that I `the followingis a full and exact description thereof,

reference being had to the accompanying drawings, ibi-ming part ot' this specification.

Our improvements relate to shutters and blinds, which are composed of a number of parallel laths or slats jointed together, and arranged in such a manner that they may be coiled upon a roller, or otherwise raised, lowered, or moved across a window, doorway, or other aperture, to open and close the same.

lhe said improvements consist in the peculiar means whereby the laths or slats'are louvered or adjusted angularly, to admit or exclude the light. The laths or slats are provided at one or both ends with two pins or projections. works in one part of a compound or double groove on the frame of the window, doorway, or other aperture. The saidcompound groove is so ,constructed that the distance between the two parts of the same may be increased or diminished, as desired, to open or close the slats or lat-hs, the said laths being so connected Yor jointed together as to allow of their free division or action in lonvering; and in order to keep the two parts of the groove always parallel with each other, we prefer to connect them by arms or links, in the same manner as an ordinary parallel rule; or the adjustable part or parts of the groove may be provided with studs, which work in curved slots or guideways. These slots allow the movable part to` move, and keep it parallel with the fixed part as it is raised. We adjust the compound groove by means of levers, cords, toothed racks, and pinions, or by other convenient means. It will generally be found more advantageous 4 to have one part of the said groove fixed and the other movable, but, if desired, both partsor channels ofthe double groove may be made adjustable.

The adjustment or louvering of the shutter or blind may be effected when the same is either entirely or partially drawn over the window, doorway, or other aperture, and the laths or slats will be held as firmly inthe grooves when they are adjusted to any desired angle, as when fully closed or opened.

Our improved shutters or blinds may be constructed of metal or wood. A We prefer to fix the pins or projections on a separate piece (or pieces) of iron or other metal, which is secured upon the end of the lath, but, if desired, in some cases, the said pins may be formed upon thelath itself.` The said shutters may be arranged to coil upon a roller, or may be made to slide Each of these two pins or projections vertically or horizontally, or otherwise, to open or close the window or other aperture, and may beoperated in any convenient manner.

' Description of 'the Drawings.

Figure 1 is a vertical section cfa easement-window provided with one of our improved louveri1ig-sl1utters, arranged to coil upon a roller or cylinder at the top of the said window.

Figures 2 and 3 represent sections of a portion ot"- the said shutters, more clearly illustrating the .means for louvering or adjusting-the laths of the same.

Figure 4 is a back elevation, and

Figure 5, a horizontal section of similar parts of the. said shutter.

Figs. 2, 3, 4, and 5, are drawn to an enlarged scale.

Like letters indicate the same parts throughout the drawings.

A is the shutter, composed of the laths a, which may be of any desired dimensions, and formed ofany suitable materials.

.-'lhe compound or double groove b consistsV of the fixed part bl and adjustable part bz, and the pins or Studs al ai are i'itted to work freely in these grooves, as clearly shown iu fig. 5.

The laths or slats a are of the usual form employed for coiling shutters,- and, as shown in iigs. 3 and 4, are

connected at propel' distances apart to strips o of webbing, or other suitable dexible material.

The laths are preferably connected to the webbing b'y strips o1" leather c', attached to the webbing cop. per rivets.

The ceiling-cylinder or roller d is mounted in the brackets e, which are attached to the under side of the lintel, andthe said roller, as shown in iig. l, is arranged above the window-trame in a convenient position to wind the shutter entirely' above the window.

It is'obviously necessary that the two parts, b1 112,'

of the `compound groove should be kept always parallel with each other, while, at the same time, they must be capable of easy adjustment from the position shown in iig. 2, to that in iig. 3, and 'vice tersa, or to any intermediate position. For this purpose,we prefer to connect the two parts of the groove together by the arms or links f, which, as in an ordinary parallel rule, permit the free adjustment of the two sides,` while keeping them always parallel with each other. We prefer to use three of these links f at each side of the shutter, as shown in iig. 1, but any convenient number may be used.

The louvering7 or adj ustmeut of the said shutters, in the example illustrated in fig. 1, is eiected by means of the segment or half pulley g, which is fitted to turn upon the pin g, fixed inthe frame or other convenient portion ofthe structure, and which is jointed near its periphery, by means of a piu, g2, to the adjustable part bz of the compound groove. When the said segment is in the position shown in'fig. l, the two parts of the compound groove lie close together, and the laths or l downward into a convenient position to allow the ad- .V

justment or louvering of `the shutter t0 be e'ecte'd thereby. l

The lintels k, frame j, sill k', and other parts of the window may be constructed in any suitable manner,

1 Abut thesotlitl is tted to slide in the frame, to allow A yaccess to the roller d, and to facilitate the mounting and removal of the same.

FIt willy thus be seen that thelouvering7 of the shutter or blind can beaccoi-nplished with equal facility in all positions of the shutter, that is to say, whether the shutter is partially coiledl upon the roller or islet completely down to secure or close the window, and that the firmness or st bility of the shutter is not in any degree affect-ed by the louvering, as the pins a.l a? are always kept within the two parts b b2 of the compound groove, which guide and support the lathsrin asI perfect a manner as though both of the said parts or sides were immovable.

Thus the operations of ceiling and louvering are each effected without interfering with each other, or rendering the shutter less convenient with regard to either function, and we are enabled to provide a shut-v ter or blind which combines the security of an ordinary ceiling shutter with the comfort and convenience of a V netian blind.

Our louvering compound groove may be applied to an ordinary outside Venetian blind, which is thus made to serve the purposes of a shutter and blind.

The raising and lowering of the blind maybe e'ected in the ordinary manner by means of a cord, while the louvering or adjustment of the laths is-eiected by the means hereinbefore described.

We prefer generally to use an arrangement by which the varying weight upon the lifting-cord is balanced, or nearly so, by a compensating weight.

This method of louvering a Venetian blind will be found much superior to the old' method of adjust ment by cords. 'i

This modification of our improvements may be readily applied to the windows of any existing dwellinghouse, and in other cases, where it is not convenient to form a recess or chamber in the wall above the window-frame, the blind in such cases being hung below the top of the frame, in the ordinary manner.

It is obvious that either of the modifications of our invention herein described, may be applied to either'a easement or a' sash-window.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. The two parallel grooved parts, b1 and b2, constructed and operating together as herein described, in combination with the laths or slats of the revolving shutter or blind A, the said laths or slats having pins or studs fitted to work in the grooves of said parts, all substantially as herein` set forth.

2. Eiecting the separation and approximation of the two parts b1 b2, ofthe compound groove by the segment g, arranged and operating in combination with the said parts, and providedwith a cord or `other meansof adjustment, substantiallyas set forth.

FREDERICK HARTT KNEVITT. [L s.] HENRY HERBERT HAZARD.A [1.. s] Witnesses:

M. WYNN, 24 Royal Exchange, London. Trios. W. PALMER. 

